期刊
PHYSICAL REVIEW LETTERS
卷 101, 期 15, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.101.157004
关键词
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资金
- US Department of Energy Basic Energy Sciences [DE-AC02-07CH11358]
- U. S. Department of Energy Office of Science [DE-AC02-06CH11357]
- NSF [DMR-0520547]
We have studied the phonon density of states (PDOS) in LaFeAsO1-xFx with inelastic neutron scattering methods. The PDOS of the parent compound (x=0) is very similar to the PDOS of samples optimally doped with fluorine to achieve the maximum T-c (x similar to 0.1). Good agreement is found between the experimental PDOS and first-principles calculations with the exception of a small difference in Fe mode frequencies. The PDOS reported here is not consistent with conventional electron-phonon mediated superconductivity.
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